/Engine/Plugins/Experimental/PlatformCrypto/Source/PlatformCryptoTypes/Public/PlatformCryptoTypes.h
Finalizes decryption of data previously passed in Update. If data was not aligned to blocksize, this will write the final chunk of data including any padding.
Success if input was valid and the final block was decrypted successfully, or Failure otherwise
[EPlatformCryptoResult](API\Plugins\PlatformCryptoTypes\EPlatformCryptoResult) Finalize ( const [TArrayView](API\Runtime\Core\Containers\TArrayView)< uint8 > OutPlaintext, int32 & OutPlaintextBytesWritten )